Merge branch into tip/master: 'x86/microcode'

Merge branch into tip/master: 'x86/microcode'

 # New commits in x86/microcode:
    4804f5ad5d63 ("x86/cpu: Add "Old Microcode" docs to hw-vuln toctree")
    b43dc4ab0978 ("x86/microcode/AMD: Do not return error when microcode update is not necessary")
    c0a62eadb6fd ("x86/microcode/AMD: Use sha256() instead of init/update/final")
    4e2c719782a8 ("x86/cpu: Help users notice when running old Intel microcode")
    321550859f3b ("x86/microcode/AMD: Clean the cache if update did not load microcode")

Signed-off-by: Ingo Molnar <mingo@kernel.org>